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Youngberry is a complex hybrid between three different species from the genus Rubus, the raspberries, blackberries, and dewberries of the rose family.[1] The berries of the plant are eaten fresh or used to make juice, jam, etc.

Byrnes M. Young, a businessman in Morgan City, Louisiana, who loved science and plants, had an ongoing correspondence[citation needed] with Luther Burbank, who had created the 'Phenomenal' blackberry–raspberry hybrid.[1] While he had no success[clarification needed] growing either loganberries (another blackberry-raspberry hybrid) or 'Phenomenal' berries, Young crossed the 'Phenomenal' with the Austin-Mayes dewberry that was better adapted to his area. This produced ‘Youngberry’ in 1905, which was then released in 1926.[citation needed]

While the youngberry is not grown much in the U.S., it is grown in Australia, New Zealand and South Africa and was a parent of the commercially successful olallie blackberry and a grandparent of the marionberry.[citation needed]

Like its 'Phenomenal' parent, it is a hexaploid.[1]


  1. ^ a b c Darrow, G.M. (1955). "Blackberry—raspberry hybrids". Journal of Heredity. 46 (2): 67–71.